Photorefractive keratectomy (PRK) is a surface laser eye surgery that reshapes the cornea to correct refractive errors without creating a corneal flap. It is an alternative to LASIK, especially in thinner or irregular corneas.
Procedure Steps
The surface epithelium is gently removed, then an excimer laser applies the planned ablation to the exposed cornea. A bandage contact lens is placed to protect the surface while the epithelium regrows.
- Treatment time is similar to LASIK, but surface healing takes several days
- There is no flap, reducing the risk of flap-related complications
- Discomfort and light sensitivity are greater in the early post-operative period
- Vision improves gradually over days to weeks
Who May Benefit
PRK is often chosen for patients with thinner corneas, certain occupational requirements, or surface irregularities. Long-term visual outcomes are comparable to LASIK in many cases.
- Thorough screening rules out corneal ectatic disorders
- Temporary haze can occur during healing, especially with higher corrections
- UV protection is important after surgery to reduce haze risk
- Enhancements, if needed, are usually done with repeat surface ablation
